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On 1/1/21 3:25 PM, mega saputra wrote:
Hello guys,
I try to create conditional statement. When I running the
formula in GRASS, there is error. Can someone help me to
convert in GRASS formula format. The formula is something like
:
if ( rgb.1 > 1810.877778) and ( rgb.1 < 23442.122222
) and (rgb.2 > 673.148594) and (rgb.2 < 22729.389558)
then 0 else if rgb.1 = 0 then 255 else 100
I have try, but with error. My false formula :
r.mapcalc --overwrite _expression_=awan = if ( rgb.1 >
1810.877778 & rgb.1 < 23442.122222 & rgb.2 >
673.148594 & rgb.2 < 22729.389558 , 0) else if ( rgb.1
= 0, 255, 100)
There is no "else" in mapcalc. You put the else _expression_ after
the second comma.
Should be:
r.mapcalc --o "awan = if(rgb.1 > 1810.877778 &&
rgb.1 < 23442.122222 && rgb.2 > 673.148594 &
rgb.2 < 22729.389558 , 0, if(rgb.1 = 0, 255, 100))
syntax error, unexpected NAME, expecting $end
Parse error
ERROR: parse error
Any suggestion?
Regards,
mega
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--
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918
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